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This article mainly explains "what are the differences between php and JavaScript". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the differences between php and JavaScript"?

Differences: 1, php is a server language, and JavaScript is a client language; 2, php string concatenator is ".", and JS is "+"; 3, array addition, php uses "+", JS uses concat () function; 4, php only variable names are case-sensitive, while JS is all case-sensitive.

The operating environment of this tutorial: windows7 system, javascript1.8.5&&PHP7.1 version, Dell G3 computer.

What is PHP?

PHP (Hypertext Preprocessor, hypertext preprocessor) is a general open source, simple, object-oriented, interpreted, robust, secure, very high-performance, architecture-independent, portable, dynamic scripting language.

PHP is a scripting language executed on the server side, which is similar to C language and is a commonly used website programming language. PHP's unique syntax is a mix of C, Java, Perl, and PHP's own syntax. Conducive to learning, widely used, mainly suitable for the field of Web development.

What is JavaScript?

JavaScript is a high-level scripting language that synchronizes with client scripting. It is a front-end multi-function language, which is mainly used to make web pages interactive and dynamic. It was originally developed to perform client-side functions, but since the release of Node.js in 2009, it has gradually evolved to provide server-side functions.

It is a versatile programming language designed to build interactive Web interfaces that make websites look great. It is one of the most powerful programming languages for creating interactive effects in Web browsers without interacting with the server side.

The difference between php and JavaScript

1. The basic characteristics of the two are different:

Php is a general open source scripting language, a server-side language. Grammar absorbs the characteristics of C language, Java and Perl, which is convenient for learning and widely used. It is mainly suitable for the field of Web development.

Js is a scripting language belonging to the network, a client language, has been widely used in Web application development, often used to add a variety of dynamic functions to web pages, to provide users with a more smooth and beautiful browsing effect. Usually JavaScript scripts implement their own functions by embedding them in HTML.

2. String concatenator

The string concatenator for php is: "."

The string concatenator for JavaScript is "+"

3. Array addition

Php array addition: "+", which can be added directly

JavaScript uses the splicing function: concat ()

4. Case sensitivity

Php: only variable names are case sensitive

_ JavaScript: all case-sensitive

5. Declare variables

Php: variable declaration with: "$variable name"

_ JavaScript: variable declaration: "var variable name"

6. on the resolution mechanism of single quotation marks and double quotation marks

Php: double quotes can parse special characters, including variables. Not single quotation marks.

_ JavaScript: there is no difference between single and double quotes.

7. Differences in real parameters.

In javascript, there is no limit to the number of parameters and arguments, and the number of parameters can be greater or less than the number of arguments.

In php, an error will be reported if the real parameter is less than the formal parameter, because some parameters are defined but not used, which may affect the function of the function in the PHP interpretation mechanism.

8. Variable values are passed in different ways:

In js, the passing of value and address of a variable is determined by the type of object passed, and cannot be controlled at will.

And all types in php are free to control whether the value is passed or addressed. Adding & before the variable can become the addressing mode, and not adding & is the way of passing value.

9. the core functions of the two are different:

The core function in php is implemented in a functional way, such as getting the length of a string: $length = strlen (str)

Js is implemented using object methods, such as getting the length of a string: var length = str.length.

Thank you for your reading, these are the contents of "what are the differences between php and JavaScript". After the study of this article, I believe you have a deeper understanding of the difference between php and JavaScript, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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